Shareholders' Equity - Assumptions to Estimate Fair Value of Employee Stock Purchase Rights on Date of Grant Using Black Scholes Option Pricing Model (Detail) - Employee Stock Purchase Plan - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.20%	1.20%	1.30%
Volatility	20.00%	28.00%	29.00%
Risk-free interest rates	4.90%	5.37%	3.02%
Expected life (years)	1 year	1 year	1 year
Weighted average fair value	$ 27.97	$ 31.56	$ 27.07